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US 4,882,455 AGranted
Electronic circuit substrates
AssigneeIbiden Co., Ltd.
InventorsYasuyuki Sato, Shinji Saito, Hidetoshi Yamauchi
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Abstract
An electronic circuit substrate having excellent machinability and dimensional accuracy is disclosed, which comprises a porous ceramic sintered body having a three-dimensional network structure and contains permeable pores, and a resin filled into the permeable pores.
Claims15
An electronic circuit, comprising:
- a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %;
- a resin filled in the permeable pores of the porous ceramic sintered substrate;
- and
- an electrically conducting circuit pattern printed on at least one surface of said substrate.
1 more element
An electronic circuit comprising:
- a porous ceramic sintered substrate comprising a material selected from the group consisting of Al.sub.2 O.sub.3, SiO.sub.2, ZnO, ZrO.sub.2, MgO, PbO, B.sub.2 O.sub.3, Si.sub.3 N.sub.4, BN, AlN and combinations thereof, said porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns and a permeable porosity of 10-70 volume %;
- a resin comprising a material selected from the group consisting of epoxy resin, polyimide resin, triazine resin, polyparabonic acid resin, polyamide imide resin, silicone resin, epoxy silicone resin, acrylic resin, methacrylic resin, aniline resin, phenolic resin, urethane resin, furan resin, fluorine resin and mixtures thereof, said resin being filled into the pores of the porous ceramic sintered substrate, thereby enhancing the machinability of the substrate and rendering said substrate substantially air impermeable after sintering;
- and
- an electrically conducting circuit pattern printed on at least one surface of said substrate.
1 more element
An electronic circuit, comprising:
- a porous ceramic sintered substrate consisting essentially of a crystal structure of a three-dimensional network, crystal grains having an average grain size of not greater than 10 microns, and an initial permeable porosity of 10-70 volume %;
- a resin filled in the permeable pores of the porous ceramic sintered substrate;
- an inorganic fiber cloth impregnated with a resin, said cloth being integrally bonded to at least one surface of said substrate;
- and
- an electrically conducting circuit pattern printed on at least one surface of said substrate.
2 more elements
Dependencies are inferred from the claim text.